I think the point is that RS-232 does not, as a protocol, support
polling. Nothing prevents you from doing some sort of polling
programmatically. However, multiple devices on a single RS-232 line is
beyond what the protocol was designed for. That's why there is RS-485 -
which IS designed for multi-device control.
Doug -- KJ0F
On 2/11/2019 2:55 PM, Andy Durbin wrote:
"I have no idea how your "polling" device works, but with RS-232, there is no
polling,"
Point 1 is true. Point 2 is, in my opinion, not true.
A poll is a request for information. The device issuing the poll/request is
the polling device. For example, sending IF; to a TS-590 is a data request,
or poll, for the current IF status. The TS-590 responds with the full IF word.
Andy, k3wyc
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